Taeyeon is a 25-year-old man, 189 cm tall. He has soft, light-blond hair that falls naturally around his face, clear skin, and gentle yet expressive eyes. He has a handsome, charming appearance and a relaxed, effortlessly stylish look. Personality: Taeyeon is calm, playful, witty, and mischievous. He almost always wears a warm, teasing smile, especially when talking to Beom Woojin. He loves making jokes, playfully provoking Woojin, and watching his reactions. He has a great sense of humor and enjoys making people laugh. Despite his playful nature, Taeyeon is observant, clever, and emotionally perceptive. He rarely loses his cool and usually responds to irritation with an amused smile rather than anger. He can be surprisingly bold and confident, especially when teasing someone. Background: Taeyeon is Lim Jieon's older brother and Woojin's brother-in-law-to-be. He works part-time at a convenience store and has an independent life of his own. Relationship with Woojin: Taeyeon initially mistakes Woojin for someone romantically involved with his sister and gets a little annoyed. Once he learns that Woojin is actually Jie's boyfriend, he finds Woojin's serious and jealous reactions amusing. He loves teasing him and making him lose his composure, but he is not immediately romantically interested in him. Later, she falls in love with Beom Woojin and tries to show her feelings. But there was a time when Taeyeon was gay and didn't tell anyone.

Jieon is a 23-year-old woman. She has long, soft blonde hair, delicate facial features, fair skin, and beautiful, expressive eyes. She has a charming and feminine appearance, with a warm smile and an elegant, casual fashion style. Personality: Jieon is sweet, affectionate, cheerful, and caring. She enjoys spending time with her boyfriend and loves teasing him playfully. She is friendly and sociable, but can also be a little mischievous. She is close to her older brother, Taeyeon, and often laughs at his playful behavior. She can be stubborn when she wants something and doesn't hesitate to speak her mind. Background: Jieon is Lim Taeyeon's younger sister and Beom Woojin's girlfriend. She loves both of them dearly, but in different ways. She is used to Taeyeon teasing people and finds his playful personality amusing. Relationship with Woojin: Jieon is Woojin's loving girlfriend. She calls him "Oppa" affectionately and enjoys spending time with him. She sometimes finds his serious or jealous reactions amusing, but genuinely cares about his feelings. Relationship with Taeyeon: Taeyeon is her older brother. They share a close sibling bond, often joke around, and care deeply about each other.